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api.go
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api.go
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package wakuext
import (
"context"
"crypto/ecdsa"
"fmt"
"time"
"github.com/ethereum/go-ethereum/log"
gethbridge "github.com/status-im/status-go/eth-node/bridge/geth"
"github.com/status-im/status-go/eth-node/types"
"github.com/status-im/status-go/services/ext"
waku "github.com/status-im/status-go/waku/common"
)
const (
// defaultWorkTime is a work time reported in messages sent to MailServer nodes.
defaultWorkTime = 5
)
// PublicAPI extends waku public API.
type PublicAPI struct {
*ext.PublicAPI
service *Service
publicAPI types.PublicWakuAPI
log log.Logger
}
// NewPublicAPI returns instance of the public API.
func NewPublicAPI(s *Service) *PublicAPI {
return &PublicAPI{
PublicAPI: ext.NewPublicAPI(s.Service, s.w),
service: s,
publicAPI: s.w.PublicWakuAPI(),
log: log.New("package", "status-go/services/wakuext.PublicAPI"),
}
}
// makeEnvelop makes an envelop for a historic messages request.
// Symmetric key is used to authenticate to MailServer.
// PK is the current node ID.
// DEPRECATED
func makeEnvelop(
payload []byte,
symKey []byte,
publicKey *ecdsa.PublicKey,
nodeID *ecdsa.PrivateKey,
pow float64,
now time.Time,
) (types.Envelope, error) {
params := waku.MessageParams{
PoW: pow,
Payload: payload,
WorkTime: defaultWorkTime,
Src: nodeID,
}
// Either symKey or public key is required.
// This condition is verified in `message.Wrap()` method.
if len(symKey) > 0 {
params.KeySym = symKey
} else if publicKey != nil {
params.Dst = publicKey
}
message, err := waku.NewSentMessage(¶ms)
if err != nil {
return nil, err
}
envelope, err := message.Wrap(¶ms, now)
if err != nil {
return nil, err
}
return gethbridge.NewWakuEnvelope(envelope), nil
}
// RequestMessages sends a request for historic messages to a MailServer.
func (api *PublicAPI) RequestMessages(_ context.Context, r ext.MessagesRequest) (types.HexBytes, error) {
api.log.Info("RequestMessages", "request", r)
now := api.service.w.GetCurrentTime()
r.SetDefaults(now)
if r.From > r.To {
return nil, fmt.Errorf("Query range is invalid: from > to (%d > %d)", r.From, r.To)
}
mailServerNode, err := api.service.GetPeer(r.MailServerPeer)
if err != nil {
return nil, fmt.Errorf("%v: %v", ext.ErrInvalidMailServerPeer, err)
}
var (
symKey []byte
publicKey *ecdsa.PublicKey
)
if r.SymKeyID != "" {
symKey, err = api.service.w.GetSymKey(r.SymKeyID)
if err != nil {
return nil, fmt.Errorf("%v: %v", ext.ErrInvalidSymKeyID, err)
}
} else {
publicKey = mailServerNode.Pubkey()
}
payload, err := ext.MakeMessagesRequestPayload(r)
if err != nil {
return nil, err
}
envelope, err := makeEnvelop(
payload,
symKey,
publicKey,
api.service.NodeID(),
api.service.w.MinPow(),
now,
)
if err != nil {
return nil, err
}
hash := envelope.Hash()
if err := api.service.w.RequestHistoricMessagesWithTimeout(mailServerNode.ID().Bytes(), envelope, r.Timeout*time.Second); err != nil {
return nil, err
}
return hash[:], nil
}